PARIS—(BUSINESS WIRE)—October 3, 2006—
Dassault Systemes (DS) (NASDAQ:
DASTY)(Paris:DSY), a world leader
in 3D and Product Lifecycle Management (PLM) solutions, will host a
conference call on Thursday, October 26, 2006, to discuss its
operating performance for the third quarter 2006 ended September 31,
2006.

The management of Dassault Systemes will host the conference call
at 9:00 AM New York Time - 3:00 PM Paris Time to discuss the Company's
operating performance.

The conference call will be available via the Internet by
accessing Dassault Systemes' website at
http://www.3ds.com/corporate/investors/. Follow the directions on the
main page to link to the audio. Please go to the website at least
fifteen minutes prior to the call to register, to download and install
any necessary audio software. The webcast will be archived for 30
days.

About Dassault Systemes

As a world leader in 3D and Product Lifecycle Management (PLM)
solutions, the Dassault Systemes group brings value to more than
90,000 customers in 80 countries. A pioneer in the 3D software market
since 1981, Dassault Systemes develops and markets PLM application
software and services that support industrial processes and provide a
3D vision of the entire lifecycle of products from conception to
maintenance. The Dassault Systemes portfolio consists of CATIA for
designing the virtual product - SolidWorks for 3D mechanical design -
DELMIA for virtual production - SIMULIA for virtual testing and ENOVIA
for global collaborative lifecycle management, including ENOVIA VPLM,
ENOVIA MatrixOne and ENOVIA SmarTeam. Dassault Systemes is listed on
the Nasdaq (DASTY) and Euronext Paris (#13065, DSY.PA) stock
exchanges. For more information, visit http://www.3ds.com

CATIA, DELMIA, ENOVIA, SIMULIA and SolidWorks are registered
trademarks of Dassault Systemes or its subsidiaries in the US and/or
other countries.
Contact: